Understanding Infiltration, etc. Order?

I am kind of new to Transformer comics outside of the Spotlights and older collections so forgive the newbie question but what is the order of the "tion" comic series. First it was Infiltration, then Escalation (I have the tpb of these). Next is the current Devastation series correct? Then what afterwards? Please help me get the order straight. By the way I get the final Megatron origin tomorrow so can't wait to read that too!